WO2010083797A2 - Method and device for annealing and descaling strips of stainless steel - Google Patents
Method and device for annealing and descaling strips of stainless steel Download PDFInfo
- Publication number
- WO2010083797A2 WO2010083797A2 PCT/DE2009/001832 DE2009001832W WO2010083797A2 WO 2010083797 A2 WO2010083797 A2 WO 2010083797A2 DE 2009001832 W DE2009001832 W DE 2009001832W WO 2010083797 A2 WO2010083797 A2 WO 2010083797A2
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- WIPO (PCT)
- Prior art keywords
- descaling
- annealing
- strip
- steel strip
- plasma
- Prior art date
Links
- 238000000137 annealing Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 28
- 229910001220 stainless steel Inorganic materials 0.000 title claims description 20
- 239000010935 stainless steel Substances 0.000 title description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 37
- 239000010959 steel Substances 0.000 claims abstract description 37
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims abstract description 5
- 238000005422 blasting Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000007774 longterm Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000010960 cold rolled steel Substances 0.000 claims 1
- 230000005672 electromagnetic field Effects 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 238000005097 cold rolling Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 6
- 238000005554 pickling Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
Definitions
- the invention relates to a method for annealing and descaling hot-rolled or cold-rolled strip of stainless steel.
- the steel strip For further processing of both hot rolled and cold rolled stainless steel strip, e.g. B. by cold rolling in the hot strip and for the production of the final products in the cold strip, the steel strip must be annealed and have a scale-free surface. Therefore, the scale formed during hot rolling or annealing must be completely removed.
- the annealing and descaling of stainless steel strip except ferritic hot strip is done in the known methods in-line in combined annealing and pickling lines.
- the annealing of hot-rolled strip or cold-rolled austenitic stainless steel as well as of cold-rolled ferritic stainless steel takes place in a horizontal continuous furnace followed by a cooling zone for cooling the strip to temperatures below 100 0 C.
- Hot-rolled strip made of ferritic stainless steel is subject to metallurgical reasons outside the annealing and pickling line as a bundle of long-term bonnet annealing with subsequent air cooling by the federal government.
- the descaling of this material is usually carried out in the above-mentioned combined annealing and pickling lines, whereby only the descaling is required because of the already performed annealing, or in special pickling lines without annealing furnace.
- the strip is first mechanically descaled by blasting with steel grain and brushing, whereby a large part of the scale is removed. Thereafter, it is pickled electrolytically and then chemically by means of various acids at elevated temperatures, the remaining scale being completely removed becomes.
- a mechanical descaling is not necessary because of the much thinner scale layer, and thus the roughness is increased too much.
- the z. Z. used methods are very complicated because the scale layer is relatively thick in the hot strip and the chromium-rich iron oxides are difficult to dissolve and therefore difficult to remove. In addition, a great deal of effort is required for the disposal of used acids, wastewater and toxic gases produced during pickling.
- the product to be descaled is running
- Descaling is carried out by the plasma located between the electrodes and the steel strip, with a metallically clean after completion of the descaling process
- Ribbon surface is present.
- the steel strip After the plasma descaling, the steel strip is cooled in a vacuum by means of cooling rollers in order to prevent the band heating resulting from the plasma descaling from exiting the strip
- the object of the invention is to improve this plasma descaling for use with stainless steel strip.
- the plasma technology represents, in particular for stainless steel strip, an environmentally friendly, qualitatively perfect and economic descaling technology.
- the cooled hot-rolled strip can be used in a combined annealing and descaling line or cold rolled stainless steel strip alone with the plasma technology completely descaled.
- a variant of austenitic and ferritic stainless steel strip is the combination of pre-descaling by blasting with steel grain followed by plasma descaling, which greatly reduces the process time required for plasma descaling.
- a device for annealing and descaling of stainless steel strip is shown schematically.
- the steel strip 1 is unwound from a discharge reel 11. With the welding machine 12, the band ends of the following bundles are welded together. Thereafter, the tape passes through a tape storage 13, from there via a S-roll stand 14 for generating the strip tension, of this by the horizontal annealing furnace 2, in which it is briefly annealed at temperatures up to 1200 'C. After annealing, the steel strip 1 passes through the cooling zone 3, where it is cooled with air or air and water spray to temperatures below 100 0 C. Thereafter, the steel strip 1 runs in the transport direction R about the guide roller 15 and over the S-roller stand 16 by the stretch bending device 4 for producing a flat strip. From there it passes through the steel grain blasting device 5. This can be used to pre-descaling hot rolled stainless steel strip 1. The Stahlkom-blasting device 5 is not required with correspondingly more powerful design of the following plasma descaling system 6.
- the steel hand 1 then passes through a further S-roll stand 17, which is required to produce the strip tension, through a multi-stage vacuum lock 7 into the process chamber 8 of the plasma descaling unit 6, in which the plasma descaling takes place.
- electrodes 9 for generating the plasma are arranged over the entire bandwidth at a predetermined distance from the band.
- the plasma descaling system 6 shown schematically here has 2 Process chambers 8. Depending on the performance of the system, the number and length of the process chambers 8 may be different. Between the process chambers, a cooling zone is arranged with adjustable cooling rollers 10 for belt cooling, which are also in a vacuum.
- the steel strip is preferably cooled with the cooling rollers 10 to a temperature below 100 0 C and then passes through the second process chamber 8, in which also above and below the steel strip 1 electrodes for generating the plasma are arranged. In this process chamber, the complete removal of the remaining scale on both sides of the steel strip takes place. Thereafter, the descaled steel strip passes through the second cooling zone with 3 cooling rollers 10, in which it is cooled to a temperature below 100 0 C. From there it runs through the multi-stage vacuum lock 7 and then enters the air atmosphere.
- the steel belt 1 runs to the take-up reel 20, where it is wound up into the finished collar 21.
- the described method and apparatus for annealing and descaling stainless steel strip provides an economically and environmentally very advantageous technology for producing high quality stainless steel strip which meets the requirements of the market.
Abstract
The invention relates to a method for annealing and descaling hot-rolled strip of austenitic stainless steel. According to the invention, the steel strip is descaled in a coupled plasma descaling plant after annealing and subsequent cooling. The plasma descaling occurs under vacuum in several stages and the steel strip is subjected to a controlled cooling by cold rolling between said stages and after thee last stage, such that on exit from the plasma descaling plant the steel strip has a temperature below 100°C.
Description
Verfahren und Vorrichtung zum Glühen und Entzundern von Band aus nichtrostendem Stahl Method and apparatus for annealing and descaling stainless steel strip
Die Erfindung betrifft ein Verfahren zum Glühen und Entzundern von warmgewalzten oder kaltgewalzten Band aus nichtrostendem Stahl.The invention relates to a method for annealing and descaling hot-rolled or cold-rolled strip of stainless steel.
Für die Weiterverarbeitung sowohl von warmgewalzten als auch von kaltgewalzten Band aus nichtrostendem Stahl, z. B. durch Kaltwalzen beim Warmband und für die Herstellung der Endprodukte beim Kaltband, muss das Stahlband geglüht werden und eine zunderfreie Oberfläche haben. Daher muss der beim Warmwalzen bzw. beim Glühen entstandene Zunder vollständig entfernt werden. Das Glühen und Entzundern von nichtrostendem Stahlband außer ferritischen Warmband erfolgt bei den bekannten Verfahren in-line in kombinierten Glüh- und Beizlinien. Das Glühen von Warmband oder Kaltband aus austenitischen nichtrostenden Stahl sowie von Kaltband aus ferritischen nichtrostenden Stahl erfolgt in einem horizontalen Durchlaufofen mit anschließender Kühlzone zur Abkühlung des Bandes auf Temperaturen unter 100 0CFor further processing of both hot rolled and cold rolled stainless steel strip, e.g. B. by cold rolling in the hot strip and for the production of the final products in the cold strip, the steel strip must be annealed and have a scale-free surface. Therefore, the scale formed during hot rolling or annealing must be completely removed. The annealing and descaling of stainless steel strip except ferritic hot strip is done in the known methods in-line in combined annealing and pickling lines. The annealing of hot-rolled strip or cold-rolled austenitic stainless steel as well as of cold-rolled ferritic stainless steel takes place in a horizontal continuous furnace followed by a cooling zone for cooling the strip to temperatures below 100 0 C.
Warmband aus ferritischen nichtrostenden Stahl wird dagegen aus metallurgischen Gründen außerhalb der Glüh- und Beizlinie als Bund einer Langzeit-Haubenglühung mit nachfolgender Luftabkühlung des Bundes unterzogen. Die Entzunderung dieses Materials erfolgt üblicherweise in den oben genannten kombinierten Glüh- und Beizlinien, wobei wegen der bereits erfolgten Haubenglühung nur die Entzunderung erforderlich ist, oder in speziellen Beizlinien ohne Glühofen.Hot-rolled strip made of ferritic stainless steel, on the other hand, is subject to metallurgical reasons outside the annealing and pickling line as a bundle of long-term bonnet annealing with subsequent air cooling by the federal government. The descaling of this material is usually carried out in the above-mentioned combined annealing and pickling lines, whereby only the descaling is required because of the already performed annealing, or in special pickling lines without annealing furnace.
Besonders die Entzunderung von warmgewalztem nichtrostenden austenitischen und ferritischen Stahlband ist sehr aufwändig, wozu bei den bekannten Verfahren mehrere Stufen erforderlich sind. Dabei wird das Band zunächst durch Strahlen mit Stahlkorn und durch Bürsten mechanisch vorentzundert, womit ein großer Teil des Zunders entfernt wird. Danach wird es elektrolytisch und anschließend chemisch mittels verschiedener Säuren bei erhöhten Temperaturen gebeizt, wobei der noch vorhandene Zunder vollständig entfernt
wird. Bei kaltgewalzten Band aus austenitischen und ferritischen nichtrostenden Stahl ist eine mechanische Vorentzunderung wegen der wesentlich dünneren Zunderschicht nicht erforderlich, außerdem wird damit die Rauheit zu stark erhöht.Especially the descaling of hot-rolled stainless austenitic and ferritic steel strip is very complicated, for which several steps are required in the known methods. In this case, the strip is first mechanically descaled by blasting with steel grain and brushing, whereby a large part of the scale is removed. Thereafter, it is pickled electrolytically and then chemically by means of various acids at elevated temperatures, the remaining scale being completely removed becomes. For cold-rolled strip of austenitic and ferritic stainless steel, a mechanical descaling is not necessary because of the much thinner scale layer, and thus the roughness is increased too much.
Die z. Z. benutzten Verfahren sind sehr aufwändig, weil die Zunderschicht beim Warmband relativ dick ist und die chromreichen Eisenoxide schwer löslich und deshalb schwer zu entfernen sind. Außerdem ist ein großer Aufwand für die Entsorgung der gebrauchten Säuren, der Abwässer und der beim Beizen entstehenden giftigen Abgase erforderlich.The z. Z. used methods are very complicated because the scale layer is relatively thick in the hot strip and the chromium-rich iron oxides are difficult to dissolve and therefore difficult to remove. In addition, a great deal of effort is required for the disposal of used acids, wastewater and toxic gases produced during pickling.
Die Entzunderung von nichtrostendem Stahlband ist nach wie vor mit Umweltbelastungen verbunden, deren Minimierung mit hohen Kosten verbunden ist.The descaling of stainless steel strip is still associated with environmental pollution, the minimization of which is associated with high costs.
Ein neues umweltfreundliches Verfahren zur Entzunderung von Band aus nichtrostendemA new environmentally friendly process for descaling stainless steel strip
Stahl ist die Plasma-Technologie, Es wird exemplarisch auf die EP 1 814 678 B1 , auf dieSteel is the plasma technology. It is exemplified in EP 1 814 678 B1, to
WO 00/056949 A1 und auf die RU 2 145 912 C1 hingewiesen.WO 00/056949 A1 and the RU 2 145 912 C1.
Bei der dort offenbarten Plasma-Entzunderungstechnologie läuft das zu entzunderndeIn the plasma descaling technology disclosed therein, the product to be descaled is running
Stahlband zwischen speziellen Elektroden, die sich in einer Vakuumkammer befinden. DieSteel strip between special electrodes located in a vacuum chamber. The
Entzunderung erfolgt durch das zwischen Elektroden und Stahlband befindliche Plasma, wobei nach Beendigung des Entzunderungsprozesses eine metallisch saubereDescaling is carried out by the plasma located between the electrodes and the steel strip, with a metallically clean after completion of the descaling process
Bandoberfläche vorhanden ist.Ribbon surface is present.
Nach der Plasmaentzunderung wird das Stahlband im Vakuum mittels Kühlrollen gekühlt, um die bei der Plasmaentzunderung entstehende Banderwärmung vor dem Austritt aus derAfter the plasma descaling, the steel strip is cooled in a vacuum by means of cooling rollers in order to prevent the band heating resulting from the plasma descaling from exiting the strip
Vakuumkammer auf eine Temperatur von maximal 100 0C zu reduzieren.Vacuum chamber to a maximum temperature of 100 0 C to reduce.
Aufgabe der Erfindung ist es, diese Plamaentzunderung für den Einsatz bei Band aus nichtrostendem Stahl zu verbessern.The object of the invention is to improve this plasma descaling for use with stainless steel strip.
Gelöst wird diese Aufgabe erfindungsgemäß mit den Merkmalen der Patentansprüche 1, 2 und 4 sowie mit einer Vorrichtung zur Durchführung der Verfahren nach Anspruch 8.This object is achieved according to the invention with the features of claims 1, 2 and 4 and with a device for carrying out the method according to claim 8.
Weitere Ausgestaltungen ergeben sich aus den Unteransprüchen.Further embodiments emerge from the subclaims.
Die Plasma-Technologie stellt insbesondere für Band aus nichtrostendem Stahl eine umweltfreundliche, qualitativ einwandfreie und wirtschaftliche Technologie der Entzunderung dar. In einer kombinierten Glüh- und Entzunderungslinie kann das gekühlte warmgewalzte
oder kaltgewalzte Band aus nicht rostendem Stahl allein mit der Plasma-Technologie vollständig entzundert werden. Eine Variante für warmgewalztes Band aus austenitischen und ferritischen nichtrostendem Stahl ist die Kombination der Vorentzunderung durch Strahlen mit Stahlkorn mit nachfolgender Plasmaentzunderung, womit die für die Plasmaentzunderung erforderliche Prozesszeit stark reduziert werden kann.The plasma technology represents, in particular for stainless steel strip, an environmentally friendly, qualitatively perfect and economic descaling technology. In a combined annealing and descaling line, the cooled hot-rolled strip can be used in a combined annealing and descaling line or cold rolled stainless steel strip alone with the plasma technology completely descaled. A variant of austenitic and ferritic stainless steel strip is the combination of pre-descaling by blasting with steel grain followed by plasma descaling, which greatly reduces the process time required for plasma descaling.
Für kaltgewalztes Band aus nichtrostendem Stahl kommt eine mechanische Vorentzunderung nicht in Frage, weil die Zunderschicht wesentlich dünner ist als bei warmgewalzten Band.For cold-rolled strip of stainless steel, a mechanical descaling is out of the question, because the scale layer is much thinner than hot-rolled strip.
Die Erfindung soll nachfolgend mit Bezug auf die Zeichnung erläutert werden.The invention will be explained below with reference to the drawing.
In Fig. 1 ist eine Vorrichtung zum Glühen und Entzundern von nichtrostendem Stahlband schematisch dargestellt.In Fig. 1, a device for annealing and descaling of stainless steel strip is shown schematically.
Das Stahlband 1 wird dabei von einem Ablaufhaspel 11 abgewickelt. Mit der Schweißmaschine 12 werden die Bandenden der jeweils folgenden Bunde aneinander geschweißt. Danach läuft das Band durch einen Bandspeicher 13, von dort über einen S- Rollenstand 14 zur Erzeugung des Bandzuges, von diesem durch den horizontalen Glühofen 2, in welchem es kurzeitig bei Temperaturen bis zu maximal 1200 'C geglüht wird. Nach dem Glühen läuft das Stahlband 1 durch die Kühlzone 3, in der es mit Luft oder Luft und Wassersprühnebel auf Temperaturen unter 100 0C abgekühlt wird. Danach läuft das Stahlband 1 in der Transportrichtung R um die Umlenkrolle 15 und über den S-Rollenstand 16 durch die Streckbiegerichtvorrichtung 4 zur Erzeugung eines planen Bandes. Von dort läuft es durch die Stahlkorn-Strahlvorrichtung 5. Mit dieser kann warmgewalztes nichtrostendes Stahlband 1 vorentzundert werden. Die Stahlkom-Strahlvorrichtung 5 ist bei entsprechend leistungsstärkerer Auslegung der nachfolgendem Plasmaentzunderungsanlage 6 nicht erforderlich.The steel strip 1 is unwound from a discharge reel 11. With the welding machine 12, the band ends of the following bundles are welded together. Thereafter, the tape passes through a tape storage 13, from there via a S-roll stand 14 for generating the strip tension, of this by the horizontal annealing furnace 2, in which it is briefly annealed at temperatures up to 1200 'C. After annealing, the steel strip 1 passes through the cooling zone 3, where it is cooled with air or air and water spray to temperatures below 100 0 C. Thereafter, the steel strip 1 runs in the transport direction R about the guide roller 15 and over the S-roller stand 16 by the stretch bending device 4 for producing a flat strip. From there it passes through the steel grain blasting device 5. This can be used to pre-descaling hot rolled stainless steel strip 1. The Stahlkom-blasting device 5 is not required with correspondingly more powerful design of the following plasma descaling system 6.
Das Stahlhand 1 läuft dann über einen weiteren S-Rollenstand 17, der zur Erzeugung des Bandzuges erforderlich ist, durch eine mehrstufige Vakuumschleuse 7 in die Prozesskammer 8 der Plasmaentzunderungsanlage 6 ein, in der die Plasmaentzunderung stattfindet. Oberhalb und unterhalb des Bandes 1 sind über die gesamte Bandbreite in einem vorgegebenen Abstand zum Band Elektroden 9 zur Erzeugung des Plasmas angeordnet. Die hier schematisch gezeigte Plasmaentzunderungsanlage 6 hat 2
Prozesskammern 8. Je nach Leistung der Anlage kann die Anzahl und Länge der Prozesskammern 8 unterschiedlich sein. Zwischen den Prozesskammern ist eine Kühlzone mit anstellbaren Kühlrollen 10 zur Bandkühlung angeordnet, die sich ebenfalls im Vakuum befinden. Das Stahlband wird mit den Kühlrollen 10 vorzugsweise auf eine Temperatur unter 100 0C gekühlt und läuft danach durch die zweite Prozesskammer 8, in der ebenfalls oberhalb und unterhalb des Stahlbandes 1 Elektroden zur Erzeugung des Plasmas angeordnet sind. In dieser Prozesskammer erfolgt die vollständige Entfernung des noch vorhandenen Zunders auf beiden Seiten des Stahlbandes. Danach läuft das entzunderte Stahlband durch die zweite Kühlzone mit 3 Kühlrollen 10, in der es auf eine Temperatur unter 100 0C abgekühlt wird. Von dort läuft es durch die mehrstufige Vakuumschleuse 7 und tritt danach in die Luftatmosphäre ein.The steel hand 1 then passes through a further S-roll stand 17, which is required to produce the strip tension, through a multi-stage vacuum lock 7 into the process chamber 8 of the plasma descaling unit 6, in which the plasma descaling takes place. Above and below the band 1, electrodes 9 for generating the plasma are arranged over the entire bandwidth at a predetermined distance from the band. The plasma descaling system 6 shown schematically here has 2 Process chambers 8. Depending on the performance of the system, the number and length of the process chambers 8 may be different. Between the process chambers, a cooling zone is arranged with adjustable cooling rollers 10 for belt cooling, which are also in a vacuum. The steel strip is preferably cooled with the cooling rollers 10 to a temperature below 100 0 C and then passes through the second process chamber 8, in which also above and below the steel strip 1 electrodes for generating the plasma are arranged. In this process chamber, the complete removal of the remaining scale on both sides of the steel strip takes place. Thereafter, the descaled steel strip passes through the second cooling zone with 3 cooling rollers 10, in which it is cooled to a temperature below 100 0 C. From there it runs through the multi-stage vacuum lock 7 and then enters the air atmosphere.
Über einen S-Rollenstand 18 und über einen Bandspeicher 19 läuft das Stahlband 1 zum Aufwickelhaspel 20, wo es zu dem fertigen Bund 21 aufgewickelt wird. Insgesamt ergibt sich mit dem beschriebenen Verfahren und der Anlage zum Glühen und Entzundern von Band aus nichtrostendem Stahl eine wirtschaftliche und ökologisch sehr vorteilhafte Technologie zur Herstellung von qualitativ hochwertigen nichtrostendem Stahlband, das die Anforderungen des Marktes erfüllt.
Via an S-pulley stand 18 and via a belt store 19, the steel belt 1 runs to the take-up reel 20, where it is wound up into the finished collar 21. Overall, the described method and apparatus for annealing and descaling stainless steel strip provides an economically and environmentally very advantageous technology for producing high quality stainless steel strip which meets the requirements of the market.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
R TransportrichtungR transport direction
1 Stahlband1 steel band
2 Durchlaufofen2 continuous furnace
3 Kühlzone3 cooling zone
StreckrichtvorrichtungTension leveling device
5 Stahlkorn-Strahlvorrichtung5 steel grain blasting device
Plasmaentzunderungsanlageplasma descaling
Vakuumschleusevacuum lock
Prozesskammerprocess chamber
Plasmaelektroden 0 KühlrollenPlasma electrodes 0 cooling rollers
11 Abhaspei 2 Schweißmaschine 3 Einlaufbandspeicher 4 Bandzugstation 5 Umlenkrolle 6 Bandzugstation 7 Bandzugstation 8 Bandzugstation 9 Auslaufbandspeicher 0 Aufwickelhaspel 1 fertiges Stahlbund
11 Abhaspei 2 Welding machine 3 Infeed belt accumulator 4 Belt tensioning station 5 Deflection pulley 6 Tensioning belt station 7 Tensioning belt station 8 Tensioning belt station 9 Discharge belt storage 0 Take-up reel 1 Finished steel belt
Claims
1. Verfahren zum Glühen und Entzundern von warmgewalzten Band aus austenitischen nichtrostendem Stahl, dadurch gekennzeichnet,1. Method for annealing and descaling austenitic stainless steel hot rolled strip, characterized
- dass das Stahlband (1) in einer kontinuierlichen Linie zunächst bei einer Temperatur von maximal 1200 0C in einem Durchlaufofen (2) kurzzeitig geglüht wird,- that the steel strip (1) is briefly annealed in a continuous line initially at a temperature of at most 1200 0 C in a continuous furnace (2),
- danach in einer anschließenden Kühlstrecke (3) auf eine Temperatur unter 100 0C abgekühlt wird,- Is then cooled in a subsequent cooling section (3) to a temperature below 100 0 C,
- danach in einer Streckbiegerichtvorrichtung (4) gerichtet wird und- Is then directed in a stretch bending device (4) and
- anschließend in einer gekoppelten Plasmaentzunderungsanlage (6) entzundert wird, wobei die Plasmaentzunderung unter Vakuum in mehreren Stufen erfolgt und das Stahlband zwischen diesen Stufen und nach der letzten Stufe einer geregelten Kühlung mittels Kühlrollen (10) unterzogen wird, so dass das Stahlband beim Austritt aus der Plasmaentzunderungsanlage eine Temperatur von unter 100 0C hat.- Is then descaled in a coupled plasma descaling system (6), the plasma descaling is carried out under vacuum in several stages and the steel strip between these stages and after the last stage of controlled cooling by means of cooling rollers (10) is subjected, so that the steel strip at the exit from the plasma descaling system has a temperature of below 100 0 C.
2. Verfahren zum Glühen und Entzundern von warmgewalzten Band aus ferritischem nichtrostenden Stahl, dadurch gekennzeichnet,2. Process for annealing and descaling hot-rolled strip of ferritic stainless steel, characterized
- dass das Stahlband zunächst als Bund in einer Haubenglühvorrichtung einer Langzeitglühung mit nachfolgender Abkühlung des Bundes auf eine Temperatur unter 100 0C unterzogen wird, und- That the steel strip is first subjected as a collar in a bell annealing a long-term annealing with subsequent cooling of the collar to a temperature below 100 0 C, and
- dass das Band anschließend in einer gekoppelten Plasmaentzunderungsanlage (6) entzundert wird, wobei die Plasmaentzunderung unter Vakuum in mehreren Stufen erfolgt und das Stahlband zwischen diesen Stufen und nach der letzten Stufe einer geregelten Kühlung mittels Kühlrollen (10) unterzogen wird, so dass das Stahlband beim Austritt aus der Plasmaentzunderungsanlage eine Temperatur von unter 100 °C hat.that the strip is then descaled in a coupled plasma descaling unit (6), wherein the plasma descaling is carried out under vacuum in several stages and the steel strip between these stages and after the last stage of a controlled cooling by means of cooling rollers (10) is subjected, so that the steel strip at the outlet from the plasma descaling plant has a temperature of less than 100 ° C.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass vor der Plasmaentzunderung eine mechanische Vorentzunderung durch Strahlen mit Stahlkorn in einer Strahlvorrichtung (5) erfolgt.3. The method according to claim 1 or 2, characterized that prior to the plasma descaling, a mechanical descaling by blasting with steel grain takes place in a blasting device (5).
4. Verfahren zum Glühen und Entzundern von kaltgewalzten Band aus nichtrostenden austenitischen und femitischen Stahl, dadurch gekennzeichnet, dass das kaltgewalzte Stahlband nach dem Glühen und Abkühlen unter Berücksichtigung der Prozessparameter für das Glühen und Entzundern mit den speziellen Anforderungen für kaltgewalztes Band in einer kontinuierlichen Linie in einer gekoppelten Plasmaentzunderungsanlage (6) entzundert wird, wobei die Plasmaentzunderung unter Vakuum in mehreren Stufen erfolgt und das Stahlband zwischen diesen Stufen und nach der letzten Stufe einer geregelten Kühlung mittels Kühlrollen (10) unterzogen wird, so dass das Stahlband beim Austritt aus der Plasmaentzunderungsanlage eine Temperatur von unter 100 0C hat.A method of annealing and descaling cold rolled strip of austenitic and austenitic stainless austenitic steel, characterized in that the cold rolled steel strip after annealing and cooling, taking into account the process parameters for annealing and descaling, with the specific requirements for cold rolled strip in a continuous line in descaling is performed under vacuum in multiple stages and the steel strip between these stages and after the last stage of a controlled cooling by means of cooling rollers (10) is subjected, so that the steel strip at the exit from the plasma descaling a Temperature of less than 100 0 C has.
5. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Produktionsleistung der Plasmaentzunderungsanlage der erforderlichen Bandgeschwindigkeit im Glühofen und den Erfordernissen unterschiedlicher Zunderschichten verschiedener Materialien anpassbar ist, indem die Gesamtlänge der aktiven Plasmaentzunderungsstrecke durch das Einschalten und Abschalten von Plasmaelektroden (9) so gesteuert wird, dass sich eine möglichst hohe Produktion bei einwandfreier Entzunderung beider Bandseiten ergibt.5. The method according to any one of the preceding claims, characterized in that the production capacity of the Plasmaentzunderungsanlage the required belt speed in the annealing furnace and the requirements of different scale layers of different materials is adaptable by the total length of the active plasma descaling by switching on and off of plasma electrodes (9) so controlled is that the highest possible production with perfect descaling results on both sides of the belt.
6. Verfahren nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, dass nach der Plasmaentzunderung ein Streckrichten und /oder Dressieren des entzunderten Stahlbandes kontinuierlich in Linie erfolgen.6. Process according to claims 1 to 5, characterized in that, after the plasma descaling, stretch straightening and / or temper rolling of the descaled steel strip take place continuously in line.
7. Verfahren nach Ansprüchen 1 bis 5, dadurch gekennzeichnet, dass bei der Plasmaentzunderung die Bewegung der Kathodenbrennflecke über die beiden Bandoberflächen mittels bewegter elektromagnetischer Felder gesteuert wird.7. The method according to claims 1 to 5, characterized in that the plasma descaling the movement of the cathode focal spots on the two strip surfaces is controlled by means of moving electromagnetic fields.
8. Vorrichtung zur Durchführung des Verfahrens nach der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass in Förderrichtung (R) des Stahlbandes (1) ein vorzugsweise horizontaler Durchlauföfen (2) mit nachfolgender Kühlstrecke (3), eine Vorrichtung zum Streckbiegerichten (4), eine Vorrichtung zur mechanischen Vorentzunderung (5) durch Strahlen mit Stahlkorn, eine Plasmaentzunderungsanlage (6) mit Vorrichtungen zur Bandkühlung (10) angeordnet ist. 8. Apparatus for carrying out the method according to claims 1 to 7, characterized in the conveying direction (R) of the steel strip (1) a preferably horizontal continuous furnace (2) with subsequent cooling section (3), device for stretch bending (4), apparatus for mechanical descaling (5) by blasting with steel grain, a plasma descaling system (6 ) is arranged with devices for belt cooling (10).
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/145,749 US20110315280A1 (en) | 2009-01-22 | 2009-12-12 | Method and Device for Annealing and Descaling Strips of Stainless Steel |
| BRPI0924152A BRPI0924152A2 (en) | 2009-01-22 | 2009-12-22 | stainless steel strip annealing and stripping process and device |
| RS20110328A RS20110328A1 (en) | 2009-01-22 | 2009-12-22 | Method and device for annealing and descaling strips of stainless steel |
| RU2011134838/02A RU2011134838A (en) | 2009-01-22 | 2009-12-22 | METHOD AND DEVICE FOR ANNEALING AND REMOVING SCALES FROM STAINLESS STEEL TAPE |
| CN200980155123XA CN102292172A (en) | 2009-01-22 | 2009-12-22 | Method and device for annealing and descaling strips of stainless steel |
| AU2009337991A AU2009337991A1 (en) | 2009-01-22 | 2009-12-22 | Method and device for annealing and descaling strips of stainless steel |
| CA2749962A CA2749962A1 (en) | 2009-01-22 | 2009-12-22 | Method and device for annealing and descaling strips of stainless steel |
| MX2011007710A MX2011007710A (en) | 2009-01-22 | 2009-12-22 | Method and device for annealing and descaling strips of stainless steel. |
| EP09837223.8A EP2389260B1 (en) | 2009-01-22 | 2009-12-22 | Method and device for annealing and descaling strips of stainless steel |
| JP2011546584A JP2012515843A (en) | 2009-01-22 | 2009-12-22 | Method and apparatus for removing scale by annealing stainless steel strip |
| ZA2011/05222A ZA201105222B (en) | 2009-01-22 | 2011-07-14 | Method and device for annealing and descaling strips of stainless steel |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009005797.8 | 2009-01-22 | ||
| DE102009005797 | 2009-01-22 | ||
| DE102009017701.9 | 2009-04-15 | ||
| DE102009017701A DE102009017701A1 (en) | 2009-01-22 | 2009-04-15 | Method and apparatus for annealing and descaling stainless steel strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2010083797A2 true WO2010083797A2 (en) | 2010-07-29 |
| WO2010083797A3 WO2010083797A3 (en) | 2010-12-09 |
Family
ID=42282716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2009/001832 WO2010083797A2 (en) | 2009-01-22 | 2009-12-22 | Method and device for annealing and descaling strips of stainless steel |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US20110315280A1 (en) |
| EP (1) | EP2389260B1 (en) |
| JP (1) | JP2012515843A (en) |
| KR (1) | KR20110103459A (en) |
| CN (1) | CN102292172A (en) |
| AU (1) | AU2009337991A1 (en) |
| BR (1) | BRPI0924152A2 (en) |
| CA (1) | CA2749962A1 (en) |
| DE (1) | DE102009017701A1 (en) |
| MX (1) | MX2011007710A (en) |
| RS (1) | RS20110328A1 (en) |
| RU (1) | RU2011134838A (en) |
| TW (1) | TW201037084A (en) |
| WO (1) | WO2010083797A2 (en) |
| ZA (1) | ZA201105222B (en) |
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|---|---|---|---|---|
| JP6031606B2 (en) * | 2012-07-31 | 2016-11-24 | ポスコＰｏｓｃｏ | High speed pickling process for producing austenitic stainless cold rolled steel sheet |
| CN103320589B (en) * | 2013-06-11 | 2014-11-05 | 鞍钢股份有限公司 | Method for preventing nickelic steel billet from being oxidized in heating process |
| CN113846291A (en) * | 2020-06-28 | 2021-12-28 | 宝山钢铁股份有限公司 | Cleaning, coating and plating combined unit for galvanized steel sheet/coil and production method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1814678A1 (en) * | 2005-03-17 | 2007-08-08 | SMS Demag Aktiengesellschaft | Method and device for descaling a metal strip |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5565317A (en) * | 1978-11-06 | 1980-05-16 | Nippon Steel Corp | Manufacture of stainless steel excellent in intergranular corrosion resistance and surface cleanness |
| JPH06212382A (en) * | 1993-01-14 | 1994-08-02 | Nippon Steel Corp | Hot dip metal coating method for high tension steel sheet |
| JPH07132316A (en) * | 1993-11-10 | 1995-05-23 | Kawasaki Steel Corp | Continuous descaling method for metallic strip |
| JPH07144212A (en) * | 1993-11-25 | 1995-06-06 | Nippon Steel Corp | Line of devices for metal surface treatment |
| JP3695063B2 (en) * | 1997-05-28 | 2005-09-14 | 住友金属工業株式会社 | Manufacturing method of stainless steel strip for clad material |
| RU2145912C1 (en) | 1998-09-08 | 2000-02-27 | Сенокосов Евгений Степанович | Method for working surface of metallic strip and apparatus for performing the same |
| WO2000056949A1 (en) | 1999-03-23 | 2000-09-28 | Evgeny Stepanovich Senokosov | Method for the vacuum arc-processing of a metallic wire (cable, strip), device for realising the same and variants |
| JP3756833B2 (en) * | 2002-03-14 | 2006-03-15 | 新日鐵住金ステンレス株式会社 | CRT inner frame, ferritic stainless steel plate therefor, and manufacturing method thereof |
| JP2006205085A (en) * | 2005-01-28 | 2006-08-10 | Ngk Insulators Ltd | Plasma processing apparatus |
| JP4813123B2 (en) * | 2005-08-10 | 2011-11-09 | 新日鐵住金ステンレス株式会社 | Method for producing austenitic stainless steel sheet with excellent surface quality |
| CN100415448C (en) * | 2006-07-14 | 2008-09-03 | 山西太钢不锈钢股份有限公司 | Method of eliminating iron scale from surface of stainless steel |
-
2009
- 2009-04-15 DE DE102009017701A patent/DE102009017701A1/en not_active Withdrawn
- 2009-12-12 US US13/145,749 patent/US20110315280A1/en not_active Abandoned
- 2009-12-22 AU AU2009337991A patent/AU2009337991A1/en not_active Abandoned
- 2009-12-22 BR BRPI0924152A patent/BRPI0924152A2/en not_active IP Right Cessation
- 2009-12-22 EP EP09837223.8A patent/EP2389260B1/en not_active Not-in-force
- 2009-12-22 MX MX2011007710A patent/MX2011007710A/en not_active Application Discontinuation
- 2009-12-22 CN CN200980155123XA patent/CN102292172A/en active Pending
- 2009-12-22 KR KR1020117018474A patent/KR20110103459A/en not_active Application Discontinuation
- 2009-12-22 RS RS20110328A patent/RS20110328A1/en unknown
- 2009-12-22 CA CA2749962A patent/CA2749962A1/en not_active Abandoned
- 2009-12-22 JP JP2011546584A patent/JP2012515843A/en active Pending
- 2009-12-22 RU RU2011134838/02A patent/RU2011134838A/en not_active Application Discontinuation
- 2009-12-22 WO PCT/DE2009/001832 patent/WO2010083797A2/en active Application Filing
-
2010
- 2010-01-12 TW TW099100691A patent/TW201037084A/en unknown
-
2011
- 2011-07-14 ZA ZA2011/05222A patent/ZA201105222B/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1814678A1 (en) * | 2005-03-17 | 2007-08-08 | SMS Demag Aktiengesellschaft | Method and device for descaling a metal strip |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2749962A1 (en) | 2010-07-29 |
| EP2389260B1 (en) | 2016-11-16 |
| KR20110103459A (en) | 2011-09-20 |
| DE102009017701A1 (en) | 2010-07-29 |
| EP2389260A2 (en) | 2011-11-30 |
| MX2011007710A (en) | 2011-09-27 |
| US20110315280A1 (en) | 2011-12-29 |
| RU2011134838A (en) | 2013-02-27 |
| ZA201105222B (en) | 2012-03-28 |
| BRPI0924152A2 (en) | 2016-02-10 |
| WO2010083797A3 (en) | 2010-12-09 |
| CN102292172A (en) | 2011-12-21 |
| AU2009337991A1 (en) | 2011-08-18 |
| JP2012515843A (en) | 2012-07-12 |
| RS20110328A1 (en) | 2012-08-31 |
| TW201037084A (en) | 2010-10-16 |
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